La presente tesi tratta il principio di concorrenza fra diritto del lavoro, diritti sociali e ordini professionali. E' un elaborato multidisciplinare comportando l’analisi di istituti, norme e principi non solo giuslavoristici, ma anche propri del diritto privato generale e del diritto antritrust / This thesis deals with the principle of competition between labor law, social rights and professional associations. it is an elaborate multi-disciplinary analysis of the leading institutions, rules and principles not only labor law but also of their private law and general law antritrust